.page-index {
  background: url('../resources/cet-index.svg') no-repeat top center;
  background-size: 100vw auto;
  background-position-y: -15vw;
  width: 100%;
  min-height: 150vw;
}
.login-box {
  z-index: 9;
  padding-top: 120vw;
}
.form-group {
  width: 90vw;
  margin: 3vw 5vw;
}
.btn {
  width: 100%;
}
.btn img {
  padding: 3vw 5vw;
  width: 100%;
  box-sizing: border-box;
}